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log₂ √1/128 = log₂ √1/√128
= log₂ 1/√(16 x 4 x 2)
= log₂ 1/ (√16√4√2)
= log₂ 1/(4 x 2 x √2)
= log₂ 1/8√2 (1/8√2 = 1/8√2 x √2/√2 = √2/16)
= log₂ √2 /16
= log₂ √2 - log₂ 16
= log₂ 2∧1/2 - log₂ 4²
= 1/2 log₂ 2 - 2 log₂ 2
= (1/2 - 2) log₂ 2
= 5/2 log₂ 2 ( log₂ 2 =1)
= 5/2 (1)
= 5/2
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